Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b98f6f4b5a9013…

MALICIOUS

PDF

40.3 KB Created: 2021-05-14 18:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5f45138239fb0f63ccc128bfc27b19dd SHA-1: 452cb4ec5092456da311b0c139b48584f08de1d8 SHA-256: 44b98f6f4b5a9013efc663d7d0e587014837e4cb01a2f5d8fe575fff5d2c3734
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting users with a fake CAPTCHA or human verification prompt. The embedded URL leads to a site promising Roblox game hacks, which is a common lure for phishing or malware distribution. No scripts were extracted, but the primary attack vector is the malicious link designed to trick the user into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/roblox-help-free-robux-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003358.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3358 26368 bytes
SHA-256: 85fb161416c44caaabd1b515e0758161b6bf1992e2a34da9f27013b5da6c9a48
font_01_sfnt_off000070eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EB 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00007c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 18264 bytes
SHA-256: 4686decc205f725eac2af31d2bb610515d085fb80a4fbb870416018a21b04127

Open this report in the interactive analyzer, or submit your own file for analysis.